Malware Analysis Report

2024-12-07 16:35

Sample ID 241114-cs5v1stbkd
Target 49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe
SHA256 49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706ac
Tags
defense_evasion discovery evasion
score
8/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
8/10

SHA256

49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706ac

Threat Level: Likely malicious

The file 49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe was found to be: Likely malicious.

Malicious Activity Summary

defense_evasion discovery evasion

Sets file to hidden

Executes dropped EXE

Deletes itself

Checks computer location settings

Indicator Removal: File Deletion

Drops file in Windows directory

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-14 02:21

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-14 02:21

Reported

2024-11-14 02:23

Platform

win7-20241023-en

Max time kernel

111s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe"

Signatures

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\zskhost.exe N/A

Indicator Removal: File Deletion

defense_evasion

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\zskhost.exe C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A
File opened for modification C:\Windows\Debug\zskhost.exe C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A
File opened for modification C:\Windows\Debug\zskhost.exe C:\Windows\SysWOW64\attrib.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\zskhost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Debug\zskhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\zskhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe

"C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\zskhost.exe

C:\Windows\Debug\zskhost.exe

C:\Windows\Debug\zskhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\49CC4A~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.baidu.com udp
HK 103.235.47.188:80 www.baidu.com tcp
US 8.8.8.8:53 EwJC5j8Iq.nnnn.eu.org udp
US 8.8.8.8:53 nd0NqhcQuY.nnnn.eu.org udp

Files

memory/2812-0-0x0000000000400000-0x0000000000410000-memory.dmp

C:\Windows\Debug\zskhost.exe

MD5 e061cef12b3a10e54973fbf81e688ccd
SHA1 7c12d0f08c738f183bd3f3d195d567486f8e2529
SHA256 5969848a1cd52978c8c2da4452b6d0d2b2fad928d407dde419e16ec4f7887b3a
SHA512 4c58e02944ca90181e8a71cbff888ffa30228f6196a7bd9421bac26b07ee649b8d0df6497b068fd2b3368d709d1c17d60f328cf716b2413d54fa90a9628e6745

memory/2812-5-0x0000000000400000-0x0000000000410000-memory.dmp

memory/3024-6-0x0000000000400000-0x0000000000410000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-14 02:21

Reported

2024-11-14 02:23

Platform

win10v2004-20241007-en

Max time kernel

111s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe"

Signatures

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\uauhost.exe N/A

Indicator Removal: File Deletion

defense_evasion

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\uauhost.exe C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A
File opened for modification C:\Windows\Debug\uauhost.exe C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A
File opened for modification C:\Windows\Debug\uauhost.exe C:\Windows\SysWOW64\attrib.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\uauhost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Debug\uauhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\uauhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe

"C:\Users\Admin\AppData\Local\Temp\49cc4a9b9c6a3ffab8832a6f41b8a1ccc6025d7cc1e948025c9e24eb921706acN.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\uauhost.exe

C:\Windows\Debug\uauhost.exe

C:\Windows\Debug\uauhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\49CC4A~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 www.baidu.com udp
HK 103.235.47.188:80 www.baidu.com tcp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 188.47.235.103.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 K94uIsXrHW.nnnn.eu.org udp
US 8.8.8.8:53 uLlaaM1z1k.nnnn.eu.org udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/5024-0-0x0000000000400000-0x0000000000410000-memory.dmp

C:\Windows\debug\uauhost.exe

MD5 0a93787ebee0280558229e1b5126b2a9
SHA1 d67af1d9f17847c48b0db22d0bc8a635df06da90
SHA256 91c741f03a408366dc0b19e8582a93299ef40c99881f356796f5f90ad204f779
SHA512 2223138e4134715239be1b3243a88c62584978f81615d453af6b40df2805ee9d215a83867ac7c4d9d58f4d88aab68e393767365e47a26979f8896221f35c54f9

memory/5024-5-0x0000000000400000-0x0000000000410000-memory.dmp

memory/3104-6-0x0000000000400000-0x0000000000410000-memory.dmp